camera: Full support for HTC camera switch

* Adds the changes for using the "htcwc" switch.
* ICS commit: https://github.com/CyanogenMod/android_frameworks_base/commit/6fa3953df37f6744af7c777f4ac803d4df44af33

Change-Id: I845d628106e386608590df7a1ed4f635f655f140